--BawA--
Advanced Member level 1
- Joined
- Nov 28, 2012
- Messages
- 479
- Helped
- 43
- Reputation
- 86
- Reaction score
- 42
- Trophy points
- 1,318
- Location
- Noida, INDIA
- Activity points
- 4,926
Hello everyone, I am designing a Microcontroller based forward converter of following ratings
Input 125VAC to 265VAC
output 12VDC
Power 32 watts
auxilary winding voltage 16V
During startup , Microcontroller and mosfet driver IC will take power from the mains through bootstrap startup circuit , and in steady state , they'll take power from auxilary winding from the Transformer,
below is the startup circuit
Intended voltage for MCU is 5V and for mosfet driver 12V to 15V will be ok
This startup circuit will give output approx 15V , now my question is "Can i connect a LM7805 at the output(emmiter) of this startup circuit to powerup the microcontroller,
or is there any other way to get 5v and 15v from the startup circuit?
Input 125VAC to 265VAC
output 12VDC
Power 32 watts
auxilary winding voltage 16V
During startup , Microcontroller and mosfet driver IC will take power from the mains through bootstrap startup circuit , and in steady state , they'll take power from auxilary winding from the Transformer,
below is the startup circuit
Intended voltage for MCU is 5V and for mosfet driver 12V to 15V will be ok
This startup circuit will give output approx 15V , now my question is "Can i connect a LM7805 at the output(emmiter) of this startup circuit to powerup the microcontroller,
or is there any other way to get 5v and 15v from the startup circuit?